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①,ds应不小于2A级螺纹最小中径,并不大于公称(基本)螺纹大径。 ②,机械螺钉的螺纹长度: 1)螺纹规格≤5#: 公称长度≤3倍公称直径的应为满扣产品,头下螺纹肩距≤1倍螺距。 公称长度>3倍公称直径到 1-1/8 in 的,允许头下肩距最大不超过2倍螺距。 若无其他规定,长螺钉的最小螺纹长度为1 in 。 2)螺纹规格≥6#: 公称长度≤3倍公称直径的应为满扣产品,头下螺纹肩距≤1倍螺距。 公称长度>3倍公称直径到 2 in 的,允许头下螺纹肩距最大不超过2倍螺距。 若无其他规定,长螺钉的最小螺纹长度为 1.5 in 。 |
1 | [美标] ASME/ANSI B 18.6.3 (T40) - 2013 |
AB型和ABR型自攻螺纹和末端 [Table 40] Dimensions of Threads and Points for Type AB and Type ABR Thread-forming Screws |
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2 | [美标] ASME/ANSI B 18.6.3 (T41) - 2013 |
B型 BP型自攻螺钉螺纹和末端 [Table 41] Dimensions of Threads and Points for Type B and BP Thread-Forming Tapping Screws |
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3 | [美标] ASME/ANSI B 18.6.3 (T42) - 2013 |
A型自攻螺钉螺纹和末端 [Table 42] Dimensions of Threads and Points for Type A Thread-Forming Tapping Screws |
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4 | [美标] ASME/ANSI B 18.6.3 (T43) - 2013 |
BF型 BT型 自切自攻螺钉螺纹和末端 [Table 43] Dimensions of Threads and Points for Types BF and BT Thread-Cutting Tapping Screws |
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5 | [美标] ASME/ANSI B 18.6.3 (T44) - 2013 |
D, F, G, T 型自攻螺钉 螺纹和末端 [Table 44] Dimensions of Threads and Points for Type D, F, G, and T Thread-Cutting Tapping Screws |
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6 | [美标] ASME/ANSI B 18.6.3 (T45) - 2013 |
自挤自攻【TRS型】螺纹和末端 [Table 45] Dimensions of Type TRS Tapping Screws |
类似标准及供货信息
7 | [美标] ASME/ANSI B 18.6.3 - 2010 |
四方槽盘头螺钉Table19 Square recessed pan head machine screws, type III |
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8 | [美标] ASME/ANSI B 18.6.7M - 1998 |
米制四方槽盘头螺钉Table13 Metric square slot pan screws |
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9 | [美标] ASME B 18.6.3 (H5C-III) - 2024 |
四方槽盘头螺钉 (ASTM F837, F468) Square Recessed Pan Head Screws, Type III (ASTM F837, F468) |